文献类型：期刊文献

英文题名：Hydrogel-Derived Honeycomb Ni3S4/N,P-C as an Efficient Oxygen Evolution Catalyst

作者：Hu, Xuejiao[1] Li, Tiancheng[3] Tang, Yidan[1] Wang, Yirong[1] Wang, Ao[2] Fu, Gengtao[1,4] Li, Xiaodong[1] Tang, Yawen[1]

第一作者：Hu, Xuejiao

通信作者：Fu, GT[1];Tang, YW[1];Wang, A[2];Fu, GT[3]

机构：[1]Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Jiangsu Prov Natl Engn Lab Biomass Chem Utilizat, Key Lab Biomass Energy & Mat, 16 Suojin 5th Village, Nanjing 210042, Jiangsu, Peoples R China;[3]Sichuan Univ, West China Hosp Stomatol, State Key Lab Oral Dis, Chengdu 610041, Sichuan, Peoples R China;[4]Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore

年份：2019

卷号：25

期号：31

起止页码：7561-7568

外文期刊名：CHEMISTRY-A EUROPEAN JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000470787200023)】；

基金：This work was financially supported by the National Natural Science Foundation of China (NSFC; nos. 21875112 and 21576139), the Natural Science Foundation of Jiangsu Province (BK20180154), the National and Local Joint Engineering Research Center of Biomedical Functional Materials, and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

语种：英文

外文关键词：doping; electrochemistry; hydrogels; nanoparticles; supported catalysts

摘要：The development of high-efficiency electrocatalysts with low costs for the oxygen evolution reaction (OER) is essential, but remains challenging. Herein, a new synthetic process is proposed to prepare Ni3S4 particles embedded in N,P-codoped honeycomb porous carbon aerogels (Ni3S4/N,P-HPC) through a hydrogel approach. The preparation of Ni3S4/N,P-HPC begins with the sol-gel polymerization of tripolyphosphate, chitosan, and guanidine polymer that contains metal-binding sites, allowing for the uniform incorporation of Ni ions into the gel matrix, freeze-drying, and subsequent carbonization under an inert atmosphere. This synthesis resolves difficulties in synthesizing the pure Ni3S4 phase caused by the instability of Ni3S4 at high temperature, while affording good control of the porous structure and N,P-doping of carbon aerogels. The synergy between the structural advantages of N,P-carbon aerogels (such as easily accessible active sites, high specific surface area, and excellent electron transport) and the intrinsic electrochemical properties of Ni3S4 result in the outstanding OER performance of Ni3S4/N,P-HPC, with overpotentials as low as 0.37 V at 10 mA cm(-2). The work outlined herein offers a simple and effective method for the development of carbon-based electrocatalysts for renewable energy conversion.